* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
#app {
    width: 800px;
    height: 599px;
    overflow: hidden;
    font-size: 12px;
    background: #161618;
    border-top: 1px solid #bbbbbb;
    color: #ebebf599;
}